/*
 * Copyright (c) 2009 Piotr Piastucki
 *
 * This file is part of Patchca CAPTCHA library.
 *
 * Patchca is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 *
 * Patchca is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Patchca. If not, see <http://www.gnu.org/licenses/>.
 */
package org.patchca.filter.predefined;

import java.awt.image.BufferedImageOp;
import java.util.ArrayList;
import java.util.List;

import org.patchca.filter.AbstractFilterFactory;
import org.patchca.filter.library.RippleImageOp;

public class RippleFilterFactory extends AbstractFilterFactory {

	protected List<BufferedImageOp>	filters;
	protected RippleImageOp			ripple;

	public RippleFilterFactory() {
		this.ripple = new RippleImageOp();
	}

	protected List<BufferedImageOp> getPreRippleFilters() {
		return new ArrayList<BufferedImageOp>();
	}

	protected List<BufferedImageOp> getPostRippleFilters() {
		return new ArrayList<BufferedImageOp>();

	}

	@Override
	public List<BufferedImageOp> getFilters() {
		if (this.filters == null) {
			this.filters = new ArrayList<BufferedImageOp>();
			this.filters.addAll(this.getPreRippleFilters());
			this.filters.add(this.ripple);
			this.filters.addAll(this.getPostRippleFilters());
		}
		return this.filters;
	}

}
